S
M
T
W
T
F
S
30
N/A
31
N/A
1
N/A
2
N/A
3
N/A
4
N/A
5
N/A
6
N/A
7
N/A
8
N/A
9
N/A
10
N/A
11
N/A
12
N/A
13
N/A
14
72°
50°
15
67°
51°
16
69°
53°
17
69°
53°
18
68°
50°
19
66°
52°
20
66°
50°
21
67°
51°
22
68°
50°
23
66°
50°
24
65°
52°
25
68°
51°
26
67°
52°
27
61°
45°
28
62°
44°
29
61°
44°
30
62°
47°
1
64°
48°
2
65°
48°
3
62°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Klamath
Klamath's September 2026 forecast shows daily high temperatures ranging from 61° to 72°, with overnight lows between 44° and 53°. The average high for September is 66° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Klamath. See also: October | November | December.
